Clamping-ear for trolley-wires.



R. L. HOFFMAN.

CLAMPING EAR FOR TROLLEY WIRES.

APPLICATION FILED OGT. 8,1907.

917,069, Pateilted Apr, 6, 1909.

Witnesses Inventor )5 2 62 22, I Ral h 1.. Hoffm n,

1 "UNITED; STATES; PATE T OFFICE. RALPH L. noFrMANQmescnENs ADY, NEW YORK, As-sIGNdii To GENERAL ELECTBlC conPANY', a CORPORATION or E Yog c. ELAMPINGFEAB iron EROLLEY-WIB??? at. 911069.] a sipecification ofpetters I Patent- Patented April 6,1999. i Application filed (actober 8, 1907. Serial No. 396,394. A

To all whom it may c'onc emL To assemble the device,the jaws are first. Be it known that I, RALPH L. HOFFMAN, a hooked into therecesses in the hanger, and citizen of the .United States, residing at i then the nut i's screwed down. The recesses 50 Schenectad county of Schenectady, State are of suflicient depth to prevent the hooks 5 of New Yorl ghave invented certain new and from becoming disengaged until the nut has useful Im rovements in Clamping-Ears for been slacked off considerably, a'nd'before Trolleyl'l ires, ofv which the followingiisja that point is reached, the jaws can be swung specification. A open far enough to admit the trolley. wire. 55 This invention relates to overhead electric lt therefore never necessary to unscrew the railways, and its object is to provide an im- 1 nut enough to permit the jaws to slip out, roved clamping ear for suspending the overunless it be. desired to removethem for repair ead conductor from the arm of a trolley Q or replacement. By turning the nut down le,- a span wire, a messenger-wire, or the on the shoulders ,6 the jaws are swung 60 like' toward each other and are caused to clamp 1 The invention comprises two duplicate the trolley wire tightly. v

clamping jaws, a hanger. on which the jaws T he device is' simple to construct, requir= are suspendechand a nut bearing on shouling but little -machining; and it can be ders on said jaws-to force them into engage quickly assembled and applied to a trolley 6e ment with the sides of the trolley wire. wire, or disengaged therefrom and taken '20 In the accompanying drawing, Figure 1 is' apart, as may be desired.

a side elevation of one embodiment of the in- What I claim as new and desire to secure volition; Fig. 2 is an end view of the same; by Letters Patent of the United States is, Fig. 3 is a perspective "iew of one jaw;'and 3 1. A clamping'ear for trolley wires, com- 7 Fig. 4 -is a perspective view of the hanger. prising a hanger, two jaws fulcrumed there- The jaws -1 are duplicates, each havinga on, each having an elevated shoulder at one longitudinal tooth 2 along its lower edge to sideof the vertical plane of suspension, 'id engao'e in'a side-groove in the trolley wire 3. n'ioans'for, forcing down said shoulders.

The aws have diverging checks 4, from the I. A clamping ear for trolley wires, coni- 75 upper edges of which the fulcrum hooksfi exirising a hanger havin recesses, two jaws tend inwardly and downwardly, leaving having fulcrums'enga'ged in said recesses and shoulders 6' standing above the ends of said provided with shoulders above and at ne hooks, and "atone side-of the hearing point-s f side of the said fulcrums, and means for thereof, 'A hanger 7, in the-shape of an inwforcing downsaid shoulders. v

. v'erted-T, is arranged to receive and support 1 3. A clamping ear for trolley wires, com- 35. said hooks, its arms having recesses Sin their prising a hamger having a screw-threaded upper sides to receive them. 1 The shank 9 of shank and arms containing recesses, two said hanger extends-up'ibetveen the hooks, i jawshaving ho'olcs on their upper edges enand; carries means forfor'cin down'the sh'oulgaged with said-recesses and provided with 8 ders of the jaws to causetieir teeth toengshoulders standing above andatone side of 40 age with the trolley wire. For this purpose, the bearing points of said hooks, and a nut T prefer to screw-thread the shank to receive onsaid shank bearing on said shoulders.

a nut 10 whose diameter is great enouglrto In witness whereof, I have hereunto seten'able it'to bear upon theshoulders 6 of the i my hand this 7th day of October, 1907.

jaws. Above the nut, the shank is con- RALPH L.- HOFFMAN.- 4 structed to be suspended from a suitable sup- I -Witnesses:

port; being, for example,-forked to admit the 2 T BENJAMIN B. HULL,

rod' 11, to which it issecured by rivets 12. l HELEN ORFORD. 

